Evidence map›Paper›PMID 33127939›Full record

ArticleScientific reports2020

Supplementation of branched-chain amino acids decreases fat accumulation in the liver through intestinal microbiota-mediated production of acetic acid.

Masao Iwao, Koro Gotoh, Mie Arakawa, Mizuki Endo, Koichi Honda, Masataka Seike, Kazunari Murakami, Hirotaka Shibata

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed, 2 pooled it
2.4field-weighted citation impact, top 10% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

37 citing papers in PubMed, 2 syntheses or guidelines pooled it, 59 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Article
  5. A Neutral Triple-Helix Pomegranate (Journal of agricultural and food chemistry · 2026
    Article
  6. Article
  7. Review
  8. Article
  9. Review
  10. Article
  11. Branched-chain amino acid metabolism: Pathophysiological mechanism and therapeutic intervention in metabolic diseases.Obesity reviews : an official journal of the International Association for the Study of Obesity · 2025
    Review
  12. Article
  13. Review
  14. Article
  15. Article
  16. Review
  17. Comparison of Intestinal Microbiota of Blue Fox before and after Weaning.Animals : an open access journal from MDPI · 2024
    Article
  18. Article
  19. Probiotics, prebiotics, and synbiotics in nonalcoholic fatty liver disease and alcohol-associated liver disease.American journal of physiology. Gastrointestinal and liver physiology · 2023
    Review
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 1 institution in 1 country.

Masao IwaoDepartment of Endocrinology, Metabolism, Rheumatology and Nephrology, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Yufu City, Oita, Japan.
Koro GotohDepartment of Endocrinology, Metabolism, Rheumatology and Nephrology, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Yufu City, Oita, Japan.
Mie ArakawaDepartment of Gastroenterology, Faculty of Medicine, Oita University, Oita, Japan.
Mizuki EndoDepartment of Gastroenterology, Faculty of Medicine, Oita University, Oita, Japan.
Koichi HondaDepartment of Gastroenterology, Faculty of Medicine, Oita University, Oita, Japan.
Masataka SeikeDepartment of Gastroenterology, Faculty of Medicine, Oita University, Oita, Japan.
Kazunari MurakamiDepartment of Gastroenterology, Faculty of Medicine, Oita University, Oita, Japan.
Hirotaka ShibataDepartment of Endocrinology, Metabolism, Rheumatology and Nephrology, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Yufu City, Oita, Japan. hiro-405@cb3.so-net.ne.jp.
Oita University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Non-alcoholic fatty liver disease (NAFLD) is a significant problem because its prevalence is increasing worldwide. Recent animal studies have identified gut microbiota as a potentially important player in the pathogenesis of NAFLD. Previously, we reported that the administration of branched-chain amino acids (BCAAs) reduces hepatic fat accumulation in experimental animal models. This study aimed to clarify how changes in the intestinal microbial flora following the administration of BCAAs affect a high-fat diet (HF)-induced fat accumulation in the liver. We examined whether the administration of BCAAs alters the development of hepatic fat accumulation as well as intestinal microbial flora. The oral administration of BCAAs (3% kcal) induced a significant increase in Ruminococcus flavefaciens (R. flavefaciens) and portal acetic acid levels, and it reduced hepatic fat accumulation in HF-fed rats. In addition, BCAAs reduced the expression of the lipogenesis-related genes FAS and ACC in the liver. Furthermore, we observed that R. flavefaciens is essential for promoting a BCAA-induced reduction in hepatic fat accumulation. These data suggest that BCAA treatment induces the proliferation of intestinal flora including R. flavefaciens and that portal acetic acid synthesized from intestinal flora improves NAFLD by downregulating the expression of FAS and ACC in the liver.

Indexed as

Dietary SupplementsGastrointestinal MicrobiomeAcetic AcidAmino Acids, Branched-ChainAnimalsDiet, High-FatFatsLipogenesisLiverNon-alcoholic Fatty Liver DiseaseRatsAcetic AcidAmino Acids, Branched-ChainFats

Identifiers

PMID33127939
PMCPMC7603487
OpenAlexW3097090305

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.